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Finding the Fourth Proportional to 8,968.62, 12,373.65 and 5,190.78

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Solution

The fourth proportional to 8,968.62, 12,373.65 and 5,190.78 is: 7,161.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,968.62 : 12,373.65 = 5,190.78 : x
  2. Step 2: Convert to fraction form
    8,968.62/12,373.65 = 5,190.78/x
  3. Step 3: Cross multiply
    8,968.62x = 12,373.65 × 5,190.78
  4. Step 4: Simplify right side
    8,968.62x = 64,228,894.95
  5. Step 5: Solve for x
    x = 64,228,894.95/8,968.62
  6. Step 6: Final answer
    x = 7,161.51

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.